… processes. Source: jzehnder / fotolia.com Nickel belongs to the heavy metals and usually occurs bound to other substances. In ambient air arsenic is measured … important source is the metal industry Health risks Nickel is mainly obtained from food although it can hardly be resorbed by the gastrointestinal tract. Occupational … Another important source is the metal industry … Nickel is mainly obtained from food although it can hardly be resorbed by the gastrointestinal tract. Occupational …

… is emitted by industrial processes. Source: jzehnder / fotolia.com Cadmium is toxic and cancerogenic. It belongs to the heavy metals and usually occurs bound to other … also be emitted at volcanic eruptions. Health risks Cadmium is mainly obtained from food. After chronic absorption by respiration the nasal mucosa can be damaged. … can also be emitted at volcanic eruptions. … Cadmium is mainly obtained from food. After chronic absorption by respiration the nasal mucosa can be damaged. …

… lead emission source. Source: B. Plank / Fotolia.com Lead is a toxic heavy metal and usually occurs bound to other substances. In ambient air lead is measured bound … are well resorbed by the human lungs. Nevertheless, lead is mainly obtained from food. Especially children’s nervous systems are damaged by little amounts which can … are well resorbed by the human lungs. Nevertheless, lead is mainly obtained from food. Especially children’s nervous systems are damaged by little amounts which can …

… matter Benzo(a)pyrene occurs when wood is combusted incompletely in firesides and ovens. Source: Marco2811 / Fotolia.com Benzo(a)pyrene is a polycyclic aromatic … particulate matter polycyclic aromatic hydrocarbons can be inhaled or obtained from food. Then they are deposited in the fatty tissue. Many of the polycyclic aromatic hydrocarbons, as well as Benzo(a)pyrene are carcinogenic, whereat harmful products are formed as products of metabolism. Taken up by respiration …